Creating a simple window

The QWidget is the base class for all the user interface classes. A widget can be a top-level widget or a child widget contained in a top-level or parent widget. Now, let's create a top-level window using QWidget. The constructor of the QWidget class takes two optional parameters, parent and flags. The parent parameter can be a QWidget object and the flags parameter can be a combination of PySide.QtCore.Qt.WindowFlags, as follows:

# Import required modules
import sys, time
from PySide.QtGui import *
from PySide.QtCore import *

# Our main window class
class SampleWindow(QWidget):
    # Constructor function
    def __init__(self):
        super(SampleWindow,self).__init__()

        self.initGUI()


    def initGUI(self):
        self.setWindowTitle("Sample Window")
        self.setGeometry(300, 300, 200, 150)
        self.setMinimumHeight(100)
        self.setMinimumWidth(250)
        self.setMaximumHeight(200)
        self.setMaximumWidth(800)
 ...